#include #include using namespace atcoder; using namespace std; using ll = long long; // -------------------------------------------------------- template bool chmax(T &a, const T b) { if (a < b) { a = b; return 1; } return 0; } template bool chmin(T &a, const T b) { if (b < a) { a = b; return 1; } return 0; } #define FOR(i, l, r) for (ll i = (l); i < (r); ++i) #define RFOR(i, l, r) for (ll i = (r) - 1; (l) <= i; --i) #define REP(i, n) FOR(i, 0, n) #define RREP(i, n) RFOR(i, 0, n) int main() { int n; cin >> n; cout << n * n << endl; }